JPS6219962B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to a machine such as a thread cutting machine or a chamfering machine that rotates a bar material to process the end thereof, and supplies the end of the bar material to a predetermined position, and then performs the next process after processing. pay out to
This invention relates to a bar handling device that performs continuous work.

When machining the end of a bar, the cutter approaches the workpiece location and cuts it, so it is fast forwarded to the nearest point.
The usual method of controlling the feed of a cutter is to start cutting at a predetermined speed corresponding to the cutting process at an appropriate interval. However, if the end of the bar is placed close to the cutter, cutting will begin during rapid movement of the cutter, resulting in damage to the cutter. On the other hand, if the end of the bar is placed far away from the cutter, when the cutter is fed at a predetermined speed depending on the cutting process, the time it takes to feed the cutter without cutting will be longer, reducing the operating rate. will come. Therefore, the accuracy with which the bar is stopped when it is fed into the vicinity of the cutter greatly affects the lifespan and operating rate of the cutter.

The first explanation of the causes of large variations in bar stopping position accuracy in conventional bar handling equipment.
This will be explained using FIGS.

The bar material P fed into the roller row 1 is brought into contact with a stopper 9 to align its ends, and is placed on the inclined skid 3 by rotating the carry-in lever. The bar naturally rolls on the inclined skid 3, hits the stopper arm 4, and stops. In this case, due to the bending of the bar itself, it will not be parallel to the position determined by the stopper 9, and an error will occur. Thereafter, the stopper arm 4 rotates around the shaft 4a in the direction of the arrow in FIG.
A cart 7 moving above advances toward the bar end processing device, travels a predetermined distance, and then stops. Trolley 7
Since they are manufactured according to the length of the bar, they have a large inertia, which causes poor stopping accuracy. On the other hand, in order to improve stopping accuracy, it is necessary to slow down the speed sufficiently before stopping, which results in a decrease in efficiency.

Another method to improve stopping accuracy is to use a lever-type limit switch 11 to detect the tip of the bar just before stopping and give a stop command to the cart, but limit switches have a certain degree of detection error.
This, combined with an error in the stopping accuracy of the cart, worsened the accuracy of the stopping position of the end of the bar.

Instead of the conventional method of transporting the bar using its own rolling motion, the present invention transports the bar from the roller row to the roller row in front of the bar end processing device without applying rolling motion to the bar before processing. The bar end precision alignment device controls the bar end position to shorten handling time and prevent end position deviation, and improves stopping accuracy at the processing position, reducing processing time and operation. The purpose of this is to improve the rate.

Next, one embodiment of the present invention will be described in detail using FIGS. 4 to 7.

The transfer device 42 shown in FIG. 4 includes a shaft 43 that is directly connected to a motor (not shown), a gear 44 that is fixed to the shaft 43 and rotates, two shafts 46A and 46B that are at the same level, and Two gears 45A, 45B of the same diameter are rotatably supported on shafts 46A, 46B and mesh with gear 44 and rotate synchronously, and arms 47A, 47 are fixed to the respective gears 45A, 45B.
B, and a transfer table 5 that straddles between a roller row whose lower end is rotatably supported by a pin 48 at the tip of the arm.
Two legs of equal length 49A, 4 fixed to the bottom of 3
9B, and three temporary storage tables 50A, 50B, and 50C fixed on the transfer table 53, and a plurality of them are arranged. Therefore, when the gears 45A and 45B rotate synchronously with the rotation of the gear 44, the transfer table 53 can be moved in a direction perpendicular to the axis of the gears while maintaining a horizontal state.

In this embodiment, as shown in FIG.
B is placed in the temporary placement table row 52, and temporary placement table 50C is placed in the drum-shaped feed roller row 54. In addition, the temporary storage stand 50B and the temporary storage stand row 52 are equipped with an arm 47A,
It can also be omitted by increasing the length of 47B.

Note that in the transfer device, instead of the gear 44, two rotary drive sources are directly connected to the two shafts 46A and 46B, and the shaft 46
A, 46B and gears 45A, 45B may be fixed, respectively, or one shaft may be directly connected to a rotational drive source, and the other may be driven by an endless track. In other words, the lower ends of legs of equal length (equal distance from the transfer surface) are rotatably supported by respective pins located at the same distance from the center of a plurality of rotating bodies having their centers at the same level. The legs may be fixed to the lower part of a transfer table having a temporary storage table at the upper part.

The bar material P thus transferred to the end alignment roller row 51 is brought into contact with the stopper 59 and its tips are aligned. Next, the transfer table 53 starts moving with one rotation of the gear 44, and the bar is transferred to the temporary storage table row 52 without being rotated by the transfer table 53. Then, the transfer table 53 moves further, and the bar is transferred to a feeding roller row 54 arranged on an extension of the bar rotation axis of the bar end processing device M. Next, the clamping device 56 on the carriage in the feed roller row 54 rises, clamps the bar, moves forward, is stopped by the stopper 60, and the clamping device 56 opens and descends. The stopper is equipped with a damper (not shown) to reduce the impact when the cart is pressed.

Since the carriage is precisely stopped mechanically by the stopper 60, the accuracy of the end positioning performed in advance in the previous process can be reproduced as is at the end processing position.

The feed roller row 54 is equipped with a brake that stops the rotation of the rollers only when loading, because slight deviations in the length direction of the bar may occur on the roller row 54 due to bending of the bar P or other factors. Although this is a transfer method that does not utilize rolling motion (not shown in the figure), there is a possibility that the end position may be slightly misaligned during delivery due to factors such as bending of the bar. For this purpose, the end precision alignment device 62 is raised and the bar is pushed back to a certain distance from the bar end processing device.
By retreating and descending, the bar end processing device M
Just before feeding it into the container, align the ends again. The end precision alignment device 62 uses a feed roller row 54 to push back the bar material and align the position.
Apply the brake to prevent the bar from going too far due to inertia. The end of the bar P is accurately fed into a predetermined position by a feed roller (not shown) inside the bar end processing device M, and the bar P is centered around the axis of the bar itself by the bar end processing device M. The bar end is then passed through and processed by the cutting blade of the bar end processing device. At that time, the roller row 54 is lowered and the turning roll row 57 is raised to support the rotating bar. The turning roll row 57 can be supported by all rolls, or can be supported by one or several rolls selected depending on the length of the bar P. In addition, the traveling range of the trolley 55 includes:
Since a turning roll is not provided, a turning roll 58 is provided on the truck to stably support short bars.

If the bar P is bent and the support bar P is rotated by all turning rolls, interference will occur between the bar P and the turning rolls, which will adversely affect the machining accuracy of the end. Therefore, the best method is to support and process only one location near the end opposite to the end to be processed. Therefore, it is preferable to select the turning roll that rises to support the bar depending on the length of the pipe. The processed bar is gripped by a clamp device on a cart 55 waiting at the forward end. The turning roll row 57 is lowered, and the feeding roller row 54 is raised instead. Thereafter, the cart 55 is sent to the rearward end, and the bar P is transferred to a subsequent process by the transfer device 53.

The explanation so far has been about handling only one bar, but one or more rows of rollers and the same number of transfer devices are provided between the end alignment roller row 51 and the feeding roller row 54. It is also possible to provide rows and process the bars while placing them one after another. Such a bar handling device reduces damage to cutters, improves efficiency, and exhibits great effects.

[Brief explanation of the drawing]

1, 2, and 3 are explanatory diagrams of the conventional method; FIG. 1 is a plan view of the entire device, FIG. 2 is a side view, and FIG. 3 is a sectional view (section B-B). 4th, 5th, 6th, 7th
The figures are explanatory diagrams of the apparatus according to the present invention, Fig. 4 is an explanatory diagram of the transfer device, Fig. 5 is an overall plan view of the apparatus, Fig. 6 is a side view, and Fig. 7 is Fig. 5 D-D. FIG. P...Bar stock, M...Machine body, 1...Roller row for bar end alignment, 2...Carry-in lever, 3...
Incline skid, 4...stopper arm, 4a...
... Axis, 6... Carriage upward tilting skid, 7... Carriage,
8...Turning roll row, 9...Stopper for end alignment, 10...Rail for bogie running, 11...
Limit switch for end detection, 12... Turning roll lifting device, 51... Roller row for tube end alignment, 52... Temporary storage stand, 53... Transfer device, 54...
... Roller row for feeding, 55 ... Cart for feeding, 56 ... Clamp device, 57 ... Turning roll row, 58 ... Turning roll on cart, 5
9... Stopper for end alignment, 60... Stopper for regulating bogie stroke (backward end), 60'... Stopper for regulating bogie stroke (forward end), 61
...Rail for bogie running, 62...End precision alignment device.

Claims (1)

[Scope of Claims] 1. In a bar processing line including a bar end processing device, a stopper is disposed on the terminal side of a bar end alignment roller row 51 with a guide and a brake, and the end alignment roller row 51 is provided with a stopper. 51, a feed roller row 54 with a brake and a guide that can be freely raised and lowered is disposed on an extension line of the bar rotation axis of the bar end processing device. Rows of movable turning rolls are arranged in parallel, and between the two roller rows 51 and 54, (a) a plurality of synchronous rotating bodies having centers on the same level and rotating in synchronization with each other, and these rotating bodies; (b) a plurality of transfer tables straddling the two roller rows 51 and 54; and (c) a rotating body fixed on the transfer tables. (d) a bar material transfer device consisting of a plurality of temporary storage tables and (d) legs of equal length fixed to the lower part of the transfer table and rotatably connected to an arm fixed to the synchronous rotating body; A track is laid below the feeding roller row 54 on the side of the bar end processing device, and on this track, (e) one or more rollers with brakes and (f) a roller with a brake can be freely raised and lowered.・A trolley equipped with one or more rotatable turning rollers and (g) one or more clamp devices that can be raised and lowered and opened and closed is arranged so as to be freely movable, and dampers are installed at the front and rear of the track. A stopper is disposed immediately before the cutting blade of the bar end processing device, and the end portion of the bar is movable up and down and back and forth in order to push back the front end of the bar against the brake of the feeding roller row 54. A bar material handling device characterized by a precision alignment device. 2. In between the bar end alignment roller row 51 and the feed roller row 54, one or more rows of guides and roller rows with brakes and stoppers are provided parallel to these, and the same number of transfers as the roller rows. The bar material handling device according to claim 1, characterized in that a device row is arranged. 3. The bar material handling device according to claim 1 or 2, characterized in that a temporary holding table having a triangular groove on the upper part is arranged between each row of rollers in parallel thereto. 4. The bar material handling device according to claim 1 or 2, wherein the roller is hourglass-shaped.